Improvement in fldid-metebs



- To ALL' WHOM AIT MAY coNeERN:

'JOHN POWERSAND .1.13. VAN DEUSEN, 0F New YORK, Nj Y.

Lettere .Patent No. 75,644,` datccl'llfarca li7, 1868.

IMPROVEMENT- IN FLUID-METERS.

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Beit known rthat we, JOHN POWERS and J. B. VAN DUsnN, of the city andState of- New York, lhave invented, made, andA applied to use, a certain.new and useful Improvement in Fluid-Meters; and We do hereby declarethe followingto -be a full, clear, Aand exactdescription-` of the saidinvention, reference being had tothe annexed drawing, making part-vof''this specification, wherein- Figurel is a vertical longitudinal'sectionof' said meter.

Figure4 2 is a transverse section of vthe same at the line a: rv.

Figure is a. plan with the cover removed.V

Similar marks of reference denote-the same parts.

i j The object 'of' this invention is to furnish a reliable and eompa'ctmeasure ofthe amount of fluid that passes through the apparatus. i

vOur-meter consists in a pair of double-acting cylinders and pistons,thecylinders being open at their ends,

-and the iiuidV passing oil through a double centralhead within eachcylinder. The pistons are connected to 4cranks that stand atrightanglesto each other on -a shaft, and the valves of the cylindersare movedby pecu'- liar levers', operated upon byV ec'centrics upon theshaft(l By this construction, the external pressure uponthe i pistons isbalanced, there is no possibilityfor the valves `to become misplaced,and theone piston carries the crank of theother past its `deadfcentre,so that there is no risk of the meter becoming inoperative by'theopposite pressures balancing cach other; and our meter'isvery compact,and o'f large capacity in proportion tothe space occupied by it. l y i iThe valves are notlcovered by any chest, but move upon the cylinderswithin the general water-space of the meter; hence there is no frictionfrom packings, and'the risk ofobstruction is much lessened.

In the drawing, et represents the bottom of the enclosing case, o theupper portion. These are united'by langesand bolts, ivithsuitablepacking, at c. A glass `maybe introduced at'oZ, through which toexamine the operation, and see that the meter contained 41n this case isinproper working order. e is the inlet-pipe, opening into the side ofthecase a. The water iills the 'entire case, so that the parts of the meterare submerged; and

e is the outlet or deliverypipe,through Which-the waterfpassesaftergoing .through the meter, as hereafter described.,

The cylindersf and gare .eachformed withjopen ends, and with a doublecentral partition,` h, leaving a water-way, la, that communicatesat 2with a trunk, Z, that c "te'nds across from the outlet-pipe e'. Withineach cylinder is a piston-rod, a', passing through 4the tubular'guide,3, that extends across the waterway k, and fits the piston-rodsufliciently closely to be water-tight or' nearly so; and m and n arepistons `upon the ends of the rod z', and o andp'are connecting-rodstothe cran`k-pins 4 and 5 of the shaft i', that is supported in bearingsq. Said crank-pins4 and 5 stand at about ninety degrees fromeach otherupon the shaft r, in order that the piston of' one of the cylinders maycarry that of the other past its 4dead-centre point, and mcve'-the valvethereof. Each cylinder is provided with" a'D or hollow valve, and theports 6 and 7 open into the cylinder on the respective' sides of thecentral partition 7L. :This valveis uponthe upper part of the cylinderwithin the general rwater-space of the meter. It is n'o't enclosedi'nany valvcchest, and becomes the communication between the cylinderand the exhaust-water way. The pressure of the fluid is balanced ontheoutside of the pistons m n,

and the changing of thevalve, by means hereafter described, at the endofeach stroke, admits the fluid to act between the partition h andone ofthe pistons, Ato give motion to the same, while the water that hadpreviously filled the other side ofthe same cylinder is being forced outthrough the lhollowvalve and water-way c, `and as the stroke isfinished, the valve is movedthe opposite way, andthe action is reversed.

In, order to give motion to the respective valves, we employ-.theconnecting-rodstand u .to the vlevers wand" v. The actioninmoving thevalves,correspouding in both cylindersiwe will only describe it withreference to the lever w and its valve. `The lever zo is attached by thefulerum-pin or screw, 8, and is formed in its middle portion as anelliptical vbow or ring, 9, the position of which-is diagonal to the'1ever(se'e lig. 1.) vThe eccentric, 10,' onV the shaft r,'is 4 placed-relatively tothecrank-pin, as'shown, and a roller, 11, islet into anotch in the eccentric, so that thes'urf'ace thereof projects slightlybeyond the surface of the eccentric, 'in order that the lever 'w may bemoved with but little friction bythe surface of said roller 11 coming incontact with theinterior ofthe elliptical bow 9. As thecrankpin,4, movesin the direction of the arrow, tig. 1, the roller, 11, coming int'ocontact with the'iiattened side of the elliptical `bow, as at 12, movesthe valve so as to open the inductionport, 6, and allow the eductionthrough the valve andport 7. The projecting portion of the eccentric,10, moving after the roller 11, prevents the lever u moving by Aanyaccidental jar, or becomingmisplaced while the meter is beingtransported or itted to place. When the eccentric and roller have movedtowards the other end of'the elliptical bow, the pistons and connectionsare in such a position that they have the leverage necessary to insurethe movement of the parts while the crank-pin of the rst cylinderispassing the dead-centre and the valve is being changed. The shape ofthe elliptical bowand the position of the eccentric and roller are suchthat the valve is moved during the last portion ot' one stroke and thecommencement of the next, and the valve is heldstationary, and open oneside or the other during the'larger portion of the stroke.

By this construction it is impossible for the meter to become blocked orinoperative when stopped or started at any part of the strol'e, andtheoperations of the meter are reliable and entirely automatic. The motionof the shaft r' is communicated by a worm, y, to' a pinion, z, on ashaft, 15, that connects 'to any desired indicatingapparatus..

' `The case a is made deeper than required for the parts of themeter, inorder that a receptacle may be formed for sediment and extraneous matter-below the working parts, so that they will not be obstructed orinjured, and a cook or plug, 16, may be employed for blowing out suchsediment.

' We do not confine ourselves. to the shape of the elliptical bow in thelevers w v, or to that of the 'eccentric or'carn operating uponisaidlever, so long as the motions specified are communicated to thc'valves'.i

We have shown the operative parts of the mcteras of brass, but the samemaybe made of other suitable material adapted to remaining in the water.l'

What we claim, and desire to secure by Letters Patent, is

1. The double-acting cylinder, open at the ends, and made with a doublepartition near the middle, in oom bination with two pistons, connectedby a rod and with the ports 6 and 7, and valve, substantially as and forthe purposes set forth.` i

n i 2. Thearrangement of two or more cylinders, constructed aslaforesaid, to operate upon one shaft, with two crank-pins, at aboutninety degrees to each other, to form a fluid-meter, substantially asspecified.

i 3. The levers w ando, connectedto, the valves, and operated from theshaft r by mechanism, substantially as specified, to move the valves inthe manner set forth,-in combination with the double-acting cylindersVand their pistons, substantially as specified.

4. A D or hollow valve, applied within the water-space of the meter, andabove the cylinder, in combination with an exhaust-water way beneath thesaid valve, substantially as and for the purposes set forth.

` 5. The trunk l, extending across below the cylinders g, and connectingthe water-wayslc with the delivery-pipe e', as and'for the purposesspecified. l

6. The case a, formed with areceptacle for sediment, belowl theoperative parts, in combination with a cock or plug for the discharge ofsaid sediment, substantially as set forth. l

In witness whereof, we have hereunto set our signatures, this third dayof February, A. D. l1868.

JOHN POWERS,

J. B. VAN DEUSEN.

Witnesses:

Cms. H. Smrn, GEO. D. WALKER.

